CN212252587U - System for adjusting smoke temperature at furnace outlet - Google Patents
System for adjusting smoke temperature at furnace outlet Download PDFInfo
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- CN212252587U CN212252587U CN202020833639.9U CN202020833639U CN212252587U CN 212252587 U CN212252587 U CN 212252587U CN 202020833639 U CN202020833639 U CN 202020833639U CN 212252587 U CN212252587 U CN 212252587U
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Abstract
The utility model discloses a system for adjusting the temperature of smoke at the outlet of a furnace chamber, which comprises a coal bunker, a screening device, a fan, a furnace chamber, a horizontal flue and a plurality of burners; the outlet of the coal bunker is communicated with the coal inlet of the screening device, the outlet of the fan is communicated with the air inlet of the screening device, the coarse powder outlet of the screening device is communicated with the inlet of the hearth, the fine powder outlet of the screening device is communicated with the inlets of the burners, and the burners are arranged on the horizontal flue of the boiler.
Description
Technical Field
The utility model belongs to boiler flue gas pollutant control environmental protection field relates to a system of furnace export regulation smoke temperature.
Background
In recent years, the power supply is loose, the power in partial areas is relatively excessive, the power peak valley and flat valley power difference is large, the thermal power generating unit is transformed flexibly in a peak load regulation mode, and the main power generating unit of the thermal power plant is operated under a low-load working condition at most of the time. However, the temperature of the furnace chamber outlet and the tail flue is low under the low-load operation of the boiler, which causes the increase of the content of fly ash and low-slag combustible substances of the boiler and the low efficiency of the boiler. In addition, under the low-load working condition of the boiler with the SCR denitration device, the temperature of a denitration area is too low and deviates from the high-efficiency action temperature range of the catalyst, the SNCR technology has certain requirements on the temperature (800-900 ℃) of a reaction area, the temperature of the reaction area is reduced during the furnace start stage or the low-load operation stage, so that the denitration efficiency is greatly reduced, the temperature is only 600-700 ℃, the temperature deviates from the SNCR denitration temperature window, the sprayed reducing agent cannot effectively react in the adaptive temperature range, and the ultralow emission standard of flue gas (less than or equal to 50 mg/Nm) cannot be met3) And simultaneously causes the waste of sprayed reducing agent and the corrosion problem of tail flue ammonium sulfate. Therefore, a technology for adjusting the smoke temperature of the boiler furnace outlet is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a system of furnace export regulation gas temperature, this system can effectively improve the flue gas temperature of boiler furnace export.
In order to achieve the purpose, the system for adjusting the smoke temperature at the outlet of the furnace chamber comprises a coal bunker, a screening device, a fan, the furnace chamber, a horizontal flue and a plurality of burners;
the outlet of the coal bunker is communicated with the coal inlet of the sieving device, the outlet of the fan is communicated with the air inlet of the sieving device, the coarse powder outlet of the sieving device is communicated with the inlet of the hearth, the fine powder outlet of the sieving device is communicated with the inlets of the burners, and the burners are arranged on the horizontal flue of the boiler.
The fine powder outlet of the sieving device is communicated with the combustor through the separator.
The fine powder outlet of the sieving device is communicated with the separator through a regulating valve.
The utility model discloses following beneficial effect has:
furnace export system of adjusting smoke temperature when concrete operation, the coal of bunker output enters into the screening ware in and sieves, wherein, the fine coal that sieves out burns in entering into the combustor, heat the flue gas, wherein, the combustor sets up on the horizontal flue of boiler, with the flue gas temperature who improves boiler furnace export, improve the denitration efficiency of follow-up equipment then, make NOx emission up to standard, and simple structure, the practicality is extremely strong, avoid extravagant reductant and afterbody flue ammonium sulfate corroded's problem in the traditional technique simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a coal bunker, 2 is a sieving device, 3 is a hearth, 4 is a fan, 5 is a horizontal flue, 6 is an adjusting valve, 7 is a separator, and 8 is a combustor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the system for adjusting the flue gas temperature at the furnace outlet of the present invention includes a coal bunker 1, a screen 2, a fan 4, a furnace 3, a horizontal flue 5 and a plurality of burners 8; the outlet of the coal bunker 1 is communicated with the coal inlet of the sieving device 2, the outlet of the fan 4 is communicated with the air inlet of the sieving device 2, the coarse powder outlet of the sieving device 2 is communicated with the inlet of the hearth 3, the fine powder outlet of the sieving device 2 is communicated with the inlet of each combustor 8, and each combustor 8 is arranged on the horizontal flue 5 of the boiler.
The fine powder outlet of the sieving device 2 is communicated with a combustor 8 through a separator 7, and the fine powder outlet of the sieving device 2 is communicated with the separator 7 through a regulating valve 6.
The utility model discloses a concrete working process does:
coal output from the coal bunker 1 enters a sieving device 2, the coal is subjected to pneumatic sieving in the sieving device 2 under the condition of hot air provided by a fan 4, wherein the sieved coarse coal is fed into a hearth 3 to be combusted, the sieved fine coal enters a combustor 8 to be combusted so as to improve the temperature of flue gas in a horizontal flue 5, the particle size of the fine coal output from the sieving device 2 is smaller than 60 microns, and the particle size of the coarse coal output from the sieving device 2 is larger than or equal to 60 microns.
In addition, the fine coal output by the screening device 2 enters the separator 7 after the flow is regulated by the regulating valve 6, large-particle coal powder is further separated by the separator 7 and then is sent into the combustor 8 to be combusted, so that the temperature of flue gas in the horizontal flue 5 is improved, the denitration efficiency of subsequent equipment is improved, NOx can be discharged up to the standard, and the large-particle coal powder separated by the separator 7 can be directly sent into the hearth 3 to be combusted.
Claims (3)
1. A system for adjusting smoke temperature at a hearth outlet is characterized by comprising a coal bunker (1), a screening device (2), a fan (4), a hearth (3), a horizontal flue (5) and a plurality of burners (8);
the outlet of the coal bunker (1) is communicated with the coal inlet of the sieving device (2), the outlet of the fan (4) is communicated with the air inlet of the sieving device (2), the coarse powder outlet of the sieving device (2) is communicated with the inlet of the hearth (3), the fine powder outlet of the sieving device (2) is communicated with the inlets of the burners (8), and the burners (8) are arranged on the horizontal flue (5) of the boiler.
2. A system for regulating the flue gas temperature at the furnace outlet according to claim 1, characterized in that the fines outlet of the screen (2) is connected to the burner (8) via a separator (7).
3. A system for regulating the flue gas temperature at a furnace outlet according to claim 1, characterized in that the fine powder outlet of the screen (2) is connected with the separator (7) through a regulating valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020833639.9U CN212252587U (en) | 2020-05-18 | 2020-05-18 | System for adjusting smoke temperature at furnace outlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020833639.9U CN212252587U (en) | 2020-05-18 | 2020-05-18 | System for adjusting smoke temperature at furnace outlet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212252587U true CN212252587U (en) | 2020-12-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020833639.9U Active CN212252587U (en) | 2020-05-18 | 2020-05-18 | System for adjusting smoke temperature at furnace outlet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212252587U (en) |
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2020
- 2020-05-18 CN CN202020833639.9U patent/CN212252587U/en active Active
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